auricular

auricular
/ɔ:ˈrɪkjulə(r); ɔ`rɪkjəlɚ/ adj
of or like the ear 耳的; 耳状的
    an auricular confession, ie one spoken privately into the ear of a priest 秘密忏悔（向神父秘密耳语忏悔）.

牛津英汉双解词典